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Analog Devices Inc./Maxim Integrated MAX6720AUTZWD3+T
- Part No.:
- MAX6720AUTZWD3+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- SOT-23-6
- Datasheet:
-
MAX6720AUTZWD3+T.pdf
- Description:
- IC SUPERVISOR 3 CHANNEL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,211
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Product details
Overview
MAX6720AUTZWD3+T from Maxim Integrated is a triple-voltage microprocessor supervisory circuit in SOT23-6 package, monitoring VCC1 (4.625V threshold), VCC2 (3.075V threshold), and an externally adjustable RSTIN input (626.5mV reference). It asserts active-low push-pull reset for ≥210ms after any supply drop, supports manual reset and watchdog timer, and operates from -40°C to +85°C in multivoltage embedded systems.
For engineers reviewing the MAX6720AUTZWD3+T datasheet, MAX6720AUTZWD3+T pinout, MAX6720AUTZWD3+T application, or MAX6720AUTZWD3+T equivalent, key selection criteria include dual-supply monitoring with factory-trimmed thresholds, 210ms reset timeout, push-pull RST output referenced to VCC1, and integrated watchdog with 35s startup/1.12s normal mode - all critical for reliable power sequencing in telecom and industrial controllers.
Technical Context
The MAX6720AUTZWD3+T implements a dual-threshold comparator architecture: one for primary supply (VCC1 = 4.625V ±125mV) and one for secondary supply (VCC2 = 3.075V ±75mV), both with 20ppm/°C tempco and 0.5% hysteresis. Its RSTIN input uses a precision 626.5mV internal reference to monitor a third voltage via external resistor divider.
It integrates a dual-mode watchdog timer (35s min startup, 1.12s min normal timeout), manual reset with 50kΩ internal pullup, and push-pull reset output guaranteed valid down to VCC1 or VCC2 = 0.8V. Reset assertion occurs within 20µs of VCC transient crossing threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC1 Threshold | 4.625V (±125mV) - factory-trimmed for precise 5V rail monitoring |
| VCC2 Threshold | 3.075V (±75mV) - factory-trimmed for stable 3.3V rail supervision |
| RSTIN Reference | 626.5mV (±15.5mV) - enables accurate third-voltage monitoring down to 0.62V |
| Reset Timeout | 210ms (min) - ensures sufficient processor hold time during brownout recovery |
| Supply Current | 14µA (typ at 3.6V) - ultra-low quiescent current for battery-backed systems |
| Operating Temp | -40°C to +85°C - qualified for industrial-grade embedded deployment |
| Reset Output | Push-pull active-low - eliminates need for external pullup; drives directly into µP reset pin |
Pinout & Package
MAX6720AUTZWD3+T is housed in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), RoHS-compliant and lead-free (+T suffix), with thermal pad omitted. Pin 1 is marked by dot; device orientation follows JEDEC MO-178AB standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | RST | Active-low push-pull reset output referenced to VCC1; asserts when VCC1/VCC2/RSTIN drop below threshold or MR pulled low |
| 2 | GND | Analog/digital ground reference for all comparators and internal logic |
| 3 | MR | Active-low manual reset input with 50kΩ internal pullup to VCC1; reset persists for full timeout after release |
| 4 | VCC2 | Secondary supply input (0.9V–3.3V); powers internal VCC2 comparator and sets RST2 reference if used |
| 5 | VCC1 | Primary supply input (1.8V–5.0V); powers core logic, sets RST output reference, and enables reset validity down to 0.8V |
| 6 | RSTIN | High-impedance adjustable monitor input; triggers reset when voltage falls below 626.5mV internal reference |
Key Features
| Feature | Design Value |
|---|---|
| Dual factory-trimmed voltage thresholds | VCC1 = 4.625V & VCC2 = 3.075V - eliminates external resistor networks for standard rails |
| Externally adjustable third-voltage monitor | RSTIN with 626.5mV reference - supports custom thresholds (e.g., 1.2V, 1.8V, 2.5V) using two resistors |
| Dual-mode watchdog timer | 35s startup + 1.12s normal timeout - accommodates boot sequences while ensuring runtime fault detection |
| Guaranteed reset validity at low VCC | Operates correctly with VCC1 or VCC2 ≥ 0.8V - enables robust brownout detection before full rail collapse |
| Immunity to short VCC transients | Withstands ≤20µs glitches below threshold - prevents spurious resets in noisy power environments |
Applications
| Telecom Power Sequencing | Industrial PLC I/O Module |
|---|---|
Use Scenario: Monitoring 48V-to-5V/3.3V DC/DC converter outputs in base station power management. IC Role / Device Role / Timing Role: Dual-rail supervisor asserting synchronized reset across FPGA, DSP, and PHY ICs during input undervoltage. Use Value: Prevents partial initialization by holding reset until both 5V and 3.3V rails stabilize above 4.625V and 3.075V respectively, with 210ms hold time. | Use Scenario: Supervising isolated 24V field bus supply and 3.3V logic rail in programmable logic controller backplane. IC Role / Device Role / Timing Role: Triple-monitoring VCC1 (24V-derived 5V), VCC2 (3.3V), and RSTIN (12V auxiliary) to detect cascaded failures. Use Value: Enables early warning of auxiliary rail collapse via RSTIN, triggering controlled shutdown before main logic corruption. |
| Medical Diagnostic Imaging | Automotive Infotainment Head Unit |
Use Scenario: Ensuring clean power-up of FPGA-based image processing pipeline in portable ultrasound devices. IC Role / Device Role / Timing Role: Monitoring battery-derived 3.3V logic rail and 1.8V core rail, with manual reset for service mode entry. Use Value: 14µA supply current extends battery life; MR input allows technician-initiated firmware reload without power cycle. | Use Scenario: Coordinating reset timing between SoC, display driver, and audio codec in infotainment system with multiple LDOs. IC Role / Device Role / Timing Role: Supervising 5V main, 3.3V I/O, and RSTIN-monitored 1.2V DDR supply to prevent memory corruption on cold start. Use Value: Push-pull RST output drives SoC reset pin directly; 210ms timeout exceeds typical SoC boot ROM execution window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor supervisory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6720AUTZTD3+T | VCC1 = 4.625V, VCC2 = 3.075V, same package and timeout, but open-drain RST output | Requires external pullup resistor; unsuitable for direct drive of µP reset pins with weak internal pullups | Select when interfacing with bidirectional reset I/O or when level-shifting is needed via external pullup |
| TPS3808G33DBVR | Single-supply monitor (3.3V threshold only), no RSTIN or watchdog, 200ms timeout, SOT23-6 | Lacks triple-monitor capability and programmable features; limited to basic 3.3V rail supervision | Select only for cost-sensitive single-rail applications where RSTIN and watchdog are unnecessary |
Compared with MAX6720AUTZWD3+T, the MAX6720AUTZTD3+T offers identical monitoring thresholds and timing but requires external biasing for reset assertion, while TPS3808G33DBVR reduces functionality to single-rail supervision - making MAX6720AUTZWD3+T the only choice for triple-voltage, watchdog-enabled, push-pull reset in space-constrained industrial designs.
Availability
MAX6720AUTZWD3+T is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and medical imaging equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX6720AUTZWD3+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for demanding industrial, automotive, and communications applications.
The MAX6715–MAX6729 family delivers ultra-low-voltage, multi-rail supervisory circuits optimized for space-constrained embedded systems needing reliable power-on reset, brownout detection, and watchdog safety monitoring.
FAQ
What is the exact reset timeout period for MAX6720AUTZWD3+T?
The MAX6720AUTZWD3+T has a minimum reset timeout period of 210ms, as indicated by the "D3" suffix in its part number. This is the guaranteed duration for which the active-low push-pull RST output remains asserted after all monitored supplies (VCC1, VCC2, RSTIN) rise above their respective thresholds. Typical timeout is 210ms, with maximum specified at 280ms over temperature and voltage extremes.
Does MAX6720AUTZWD3+T support monitoring a third voltage, and how is it configured?
Yes, MAX6720AUTZWD3+T supports third-voltage monitoring via its RSTIN pin, which references an internal 626.5mV precision bandgap. To monitor a custom voltage (e.g., 1.2V or 2.5V), connect an external resistor divider between the target rail and GND, with the midpoint fed to RSTIN. The threshold is set by VEXT = 626.5mV × (R1 + R2)/R2, enabling accurate undervoltage detection independent of VCC1/VCC2.
What are the voltage threshold levels programmed into MAX6720AUTZWD3+T?
The "TZ" suffix in MAX6720AUTZWD3+T decodes to VCC1 = 4.625V (±125mV) and VCC2 = 3.075V (±75mV), per Maxim's Reset Voltage Threshold Suffix Guide. These are factory-trimmed, laser-adjusted thresholds - not user-configurable - ensuring high accuracy without external components for standard 5V and 3.3V supply rails.
Is MAX6720AUTZWD3+T compatible with manual reset switches and watchdog timer signals?
Yes, MAX6720AUTZWD3+T includes both a dedicated active-low manual reset input (MR) with 50kΩ internal pullup to VCC1, and a watchdog input (WDI) supporting dual-mode operation: 35s minimum startup timeout after power-up or reset, followed by 1.12s minimum normal timeout. WDI accepts TTL/CMOS-compatible edges and clears the watchdog on any rising or falling transition.
What package type and environmental rating does MAX6720AUTZWD3+T use?
MAX6720AUTZWD3+T is supplied in a 6-pin SOT23-6 package (2.9mm × 1.6mm × 1.1mm), lead-free and RoHS-compliant (indicated by the "+T" suffix). It is rated for operation from -40°C to +85°C ambient temperature and features guaranteed reset validity down to VCC1 or VCC2 = 0.8V - meeting industrial-grade reliability requirements.
MAX6720AUTZWD3+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 3
- Voltage - Threshold:
- 1.665V, 2.313V, Adj
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX6720AUTZWD3+T FAQ
1.How can I place an order for MAX6720AUTZWD3+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6720AUTZWD3+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6720AUTZWD3+T reliable?
The price and inventory of MAX6720AUTZWD3+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6720AUTZWD3+T is usually 5 days.
3.What payment methods are accepted for MAX6720AUTZWD3+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6720AUTZWD3+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6720AUTZWD3+T?
MAX6720AUTZWD3+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6720AUTZWD3+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6720AUTZWD3+T?
For technical support, including MAX6720AUTZWD3+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6720AUTZWD3+T requirements.
6.How does Aetrix verify that MAX6720AUTZWD3+T is sourced from the original manufacturer or authorized distributors?
All MAX6720AUTZWD3+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6720AUTZWD3+T meets industry standards.
7.What is the process for return or replacement of MAX6720AUTZWD3+T?
All MAX6720AUTZWD3+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX6720AUTZWD3+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6720AUTZWD3+T part is unused and in its original packaging.
Return procedure for MAX6720AUTZWD3+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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